Apple has released iTunes 10.1.1 via their Software Update utility and website. According to the company, this release provides a number of important bug fixes, including:

Addresses an issue where some music videos may not play on Macs equipped with NVIDIA GeForce 9400 or 9600 graphics. Resolves an issue where iTunes may unexpectedly quit when deleting a playlist that has the iTunes Sidebar showing. Fixes a problem where iTunes may unexpectedly quit when connecting an iPod to a Mac equipped with a PowerPC processor. Addresses an issue where some music videos may not sync to an iPod, iPhone, or iPad.
The iTunes 10.1.1 update weighs in at 90.5 MB and requires Mac OS X 10.5 or later.